Measurement of the transverse momentum distribution of Z/γ bosons in proton–proton collisions at s=7 TeV with the ATLAS detector

A measurement of the Z/γ* transverse momentum (pTZ) distribution in proton–proton collisions at √s = 7 TeV is presented using Z/γ* → e+e– and Z/γ* → μ+μ– decays collected with the ATLAS detector in data sets with integrated luminosities of 35 pb–1 and 40 pb–1, respectively. The normalized differenti...

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Veröffentlicht in:	Physics letters. B 2011-10, Vol.705 (5)
Hauptverfasser:	Alessandria, F., Andrieux, M. -L., Anghinolfi, F., Aoun, S., Beddall, A., Bobrovnikov, V. B., Borroni, S., Caprini, I., Caron, B., Castro, N. F., Cheplakov, A., Chu, M. L., Chudoba, J., Collard, C., Dam, M., De La Taille, C., DeWilde, B., Di Sipio, R., Drees, J., Esposito, B., Feligioni, L., Feng, C., Ferrara, V., Franz, S., Gadomski, S., Gallas, E. J., Garberson, F., Giakoumopoulou, V., Glasman, C., Glazov, A., Gonçalo, R., González de la Hoz, S., Gouanère, M., Guicheney, C., Han, L., Hensel, C., Hillert, S., Hughes-Jones, R. E., Jia, J., Jon-And, K., Kajomovitz, E., Kass, R. D., Kataoka, Y., Khalil-zada, F., Kind, O., König, A. C., Köpke, L., Koll, J., Kowalewski, R., Kruth, A., Lafaye, R., Lee, L., Leitner, R., Lipinsky, L., Litke, A. M., Love, J., Macana Goia, J. A., Malon, D., Mameghani, R., Martin dit Latour, B., Maslennikov, A. L., Matsunaga, H., McCubbin, N. A., Mills, W. J., Mohrdieck-Möck, S., Mora Herrera, C., Mueller, K., Nadal, J., Nunes Hanninger, G., Nurse, E., Okumura, Y., Oram, C. J., P Ottersbach, J., Ozcan, V. E., Pastore, F., Piec, S. M., Radics, B., Renkel, P., Rurikova, Z., Schernau, M., Schmitt, S., Schmitz, M., Schune, Ph, Seixas, J. M., Siegert, F., Slavicek, T., Smakhtin, V., Snyder, S., Sondericker, J., Stelzer, H. J., Tatarkhanov, M., Taylor, G. N., Touchard, F., Tsung, J. -W., Vorwerk, V., Wengler, T., Wijeratne, P. A., Willocq, S., Zeitnitz, C., Zimmermann, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Differential cross section Event generators Monte Carlo models Perturbative QCD PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Z bosons
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Zusammenfassung:	A measurement of the Z/γ* transverse momentum (pTZ) distribution in proton–proton collisions at √s = 7 TeV is presented using Z/γ* → e+e– and Z/γ* → μ+μ– decays collected with the ATLAS detector in data sets with integrated luminosities of 35 pb–1 and 40 pb–1, respectively. The normalized differential cross sections are measured separately for electron and muon decay channels as well as for their combination up to pTZ of 350 GeV for invariant dilepton masses 66 GeV < mℓℓ < 116 GeV. The measurement is compared to predictions of perturbative QCD and various event generators. In conclusion, the prediction of resummed QCD combined with fixed order perturbative QCD is found to be in good agreement with the data.
ISSN:	0370-2693